Active control of crossflow-induced transition by means of in-line pneumatic actuator orifices
Active control of crossflow-induced transition by means of in-line pneumatic actuator orifices
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DOI：
10.1007/s00348-016-2213-x
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发表时间：
2016-08-01
影响因子：
2.4
通讯作者：
Nitsche, W.
中科院分区：
文献类型：
--
作者：
Lohse, J.;Barth, H. P.;Nitsche, W.
本文用热线法研究了气动作动器控制横流涡致层流破裂的可能性。通过沿展向的一排周期性排列的喷孔进行稳定的吹气或吸气，会产生一个纵向涡流系统，该系统会减小最大放大的稳定横流涡流的振幅。因此，高频二次不稳定性的发生和随后的层流湍流转捩被进一步向下游移动。所有的实验都是在哥廷根DLR的1米风洞的开放试验段中重新设计的DLR后掠平板实验中进行的。
The possibility of a pneumatic actuator system for controlling the crossflow vortex-induced laminar breakdown is investigated by means of hot-wire measurements. Steady blowing or suction through a spanwise row of periodically arranged orifices initiates a system of longitudinal vortices which reduces the amplitude of the most amplified stationary crossflow vortices. Thus, the onset of high-frequency secondary instability and the following laminar turbulent transition was shifted farther downstream. All experiments were conducted at the redesigned DLR swept flat plate experiment in the open test section of the 1 m wind tunnel at the DLR in Gottingen.